diff --git a/scripts/m11b4_selftest.py b/scripts/m11b4_selftest.py
index 5244f65..c0a8109 100644
--- a/scripts/m11b4_selftest.py
+++ b/scripts/m11b4_selftest.py
@@ -310,12 +310,20 @@ def try_mysql_explain():
 def test_e2e_latency(dbpath):
     section("AC3 端到端时延基准：裁决→write_event_with_state→COMMIT→广播→消费端感知")
     n = 200
+    # 写入端连接走模块统一解析链的「环境变量」级（project-directory-spec 8.1：
+    # 模块禁止读部署 env/{test,prod}.json，凭据只在环境里），不注入私有工厂
+    os.environ["PBL_RUNTIME_DB_URL"] = "sqlite:///" + dbpath
     hooked = install_broadcast_hook(force=True)
     reset_fallback(factory_for(dbpath))
     events, seq = [], 0
 
     def _state_builder(ev):
-        return None  # 只测事件写入链路，不污染状态表
+        # 真实链路 = 事件 + 实体状态同事务写入（M11b-2），故给出合法 state_update
+        return {
+            "tenant_id": ev["tenant_id"], "session_id": "ss_bench",
+            "entity_id": ev["entity_id"], "state": {"hp": 100, "i": ev["seq"]},
+            "updated_by": "m11b4_bench",
+        }
 
     for i in range(n):
         seq += 1
@@ -417,6 +425,7 @@ def main():
     dbpath = os.path.join(tmpdir, "m11b4.sqlite")
     conn = make_db(dbpath)
     conn.close()
+    os.environ["PBL_RUNTIME_DB_URL"] = "sqlite:///" + dbpath
     scene, uid, t_created = test_broadcast_lost_recovered_within_3s(dbpath)
     test_no_duplicate_delivery(dbpath, scene, uid)
     test_watermark_format_guard(dbpath)